What does the Bible say about legacies in Christ?

Hebrews 9:17 explains that a testament is of no force while the testator lives, signifying that Jesus' will for His followers became effective upon His death. His sacrificial act on the cross not only confirmed His testament but also established the inheritance of His church, described as 'incorruptible and undefiled.' This legacy is validated in the court of heaven, where Jesus acts as the executor of His will, ensuring that all His promises and provisions for believers are fully realized.